Method of applying enamel and kindred coatings to iron.



HENRY GRANT HIGLEY, OF TAMPICO, MEXICO.

METHOD OF APPLYING ENAMEL AND KINDRED COATINGS T0 IRON.

No Drawing.

To all whom it may concern Be it known that I, HENRY GRANT HIG- LEY, acitizen of the United States, and at present residing at Tampico,Mexico, have invented a new and useful Improvement in Methods ofApplying Enamel and Kindred Coatings to Iron, of which the following istime, and then the enamel is fused on, it

a specification.

This invention relates to the process of applying enamel and kindredcoatings to iron surfaces, be the latter for ornamental or for otherpurposes, that the said adhesion will be very great.

My process comprises "a preliminary treatment of the iron surface to beenameled.

The following process comprises my invention: For th1s preliminarytreatment the iron is coated, preferably by submersion, in a bathofdilute sulfuric acid to which has been added that form of iron oXidknown as iron rust, and. also enameling powder, then the iron is allowedto dry. It is now ready to receive the enamel and be placed in the pvenin the usual way. There should be enough enamel powder in the bath sothat a piece of iron dipped into the bath, will retain a coat or film ofthe said enamel powder when lifted out.

The process which comprises my invention is as follows: Immerse the ironwhich 'of time preferably of from one to twelve hours, the bathcontaining enamel powder, then remove the iron from the bath and in itswet or dry state apply the enamel either Specification of LettersPatent.

Patented Apr. 4, 1916.

Application filed March 31, 1914. Serial No. 828,455.

dry, or wet with water, allow the enamel coating co dry and then theiron is ready to be placed in the oven. It can also be placed in theoven in a moist state. When iron or steel or any alloy containing ironis immersed in a solution of dilute sulfuric acid containing iron rustfor an hour or longer will be found that the enamel will adhere verystrongly to the iron, also if the enamel powder is applied wet withdilute sulfuric acid instead of with water, the enamel will fuse on morestrongly than it will when it is applied wet with water.

There are several kinds of enameling powders used for enameling iron,and it is preferable to use that-particular kind in the bath for thepreliminary treatment as will be used later as the enamel proper forenameling the iron. And I do not claim the mixture of any of theseenamels.

With my preliminary treatment above described, it will be found that theenamel that may be applied,can not very easily be separated from theiron after'coming from the oven.

1 claim: The process of enameling ironconsistin in immersing the iron ina bath of dilute sulfuric acid containing iron oxid and enamelcomposition, applying enamel to the iron so treated and then firing inthe usual manner.

HENRY GRANT HIGLEY. Witnesses:

THEODORE D. ROCK, GEO. W. WALKER.

